1. South London and Maudsley NHS Foundation Trust, London, UK
2. Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
3. Department of Biostatistics and Health Informatics, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
4. Emotion & Development Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
5. NIHR South London and Maudsley Biomedical Research Centre, London, UK
6. Health Data Research UK London, University College London, London, UK
7. Institute of Health Informatics, University College London, London, UK
8. NIHR Biomedical Research Centre, University College London Hospitals NHS Foundation Trust, London, UK